65312773 has 2 divisors, whose sum is σ = 65312774. Its totient is φ = 65312772.

The previous prime is 65312717. The next prime is 65312791. The reversal of 65312773 is 37721356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62378404 + 2934369 = 7898^2 + 1713^2 .

It is a cyclic number.

It is not a de Polignac number, because 65312773 - 2¹³ = 65304581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65312173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32656386 + 32656387.

It is an arithmetic number, because the mean of its divisors is an integer number (32656387).

Almost surely, 2^65312773 is an apocalyptic number.

It is an amenable number.

65312773 is a deficient number, since it is larger than the sum of its proper divisors (1).

65312773 is an equidigital number, since it uses as much as digits as its factorization.

65312773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 34.

The square root of 65312773 is about 8081.6318277932. The cubic root of 65312773 is about 402.7164541812.

It can be divided in two parts, 65312 and 773, that multiplied together give a triangular number (50486176 = T₁₀₀₄₈).

The spelling of 65312773 in words is "sixty-five million, three hundred twelve thousand, seven hundred seventy-three".